THE CODE I USED FOR CONTROL VISIBILITY:
Public Sub Main()
Select Case DIN
'DIN
Case "DIN 32676 SERIES 1"
setVisibility("DIN32676SERIES1",True)
setVisibility("DIN32676SERIES2STANDARD",False)
setVisibility("DIN32676SERIES2NONSTANDARD", False)
setVisibility("DIN32676SERIES3", False)
setVisibility("DIN11850", False)
setVisibility("ISO2037SERIES1", False)
setVisibility("ISO2037SERIES2", False)
setVisibility("ISO1127SERIES1", False)
Case "DIN 32676 SERIES 2 STANDARD"
setVisibility("DIN32676SERIES1",False)
setVisibility("DIN32676SERIES2STANDARD",True)
setVisibility("DIN32676SERIES2NONSTANDARD", False)
setVisibility("DIN32676SERIES3", False)
setVisibility("DIN11850", False)
setVisibility("ISO2037SERIES1", False)
setVisibility("ISO2037SERIES2", False)
setVisibility("ISO1127SERIES1", False)
Case "DIN 32676 SERIES 2 NON STANDARD"
setVisibility("DIN32676SERIES1",False)
setVisibility("DIN32676SERIES2STANDARD",False)
setVisibility("DIN32676SERIES2NONSTANDARD", True)
setVisibility("DIN32676SERIES3", False)
setVisibility("DIN11850", False)
setVisibility("ISO2037SERIES1", False)
setVisibility("ISO2037SERIES2", False)
setVisibility("ISO1127SERIES1", False)
Case "DIN 32676 SERIES 3"
setVisibility("DIN32676SERIES1",False)
setVisibility("DIN32676SERIES2STANDARD",False)
setVisibility("DIN32676SERIES2NONSTANDARD",False)
setVisibility("DIN32676SERIES3", True)
setVisibility("DIN11850", False)
setVisibility("ISO2037SERIES1", False)
setVisibility("ISO2037SERIES2", False)
setVisibility("ISO1127SERIES1", False)
Case "DIN 11850"
setVisibility("DIN32676SERIES1",False)
setVisibility("DIN32676SERIES2STANDARD",False)
setVisibility("DIN32676SERIES2NONSTANDARD",False)
setVisibility("DIN32676SERIES3",False)
setVisibility("DIN11850", True)
setVisibility("ISO2037SERIES1", False)
setVisibility("ISO2037SERIES2", False)
setVisibility("ISO1127SERIES1", False)
'ISO
Case "ISO 2037 SERIES 1"
setVisibility("ISO2037SERIES1", True)
setVisibility("ISO2037SERIES2", False)
setVisibility("ISO1127SERIES1", False)
setVisibility("DIN32676SERIES1",False)
setVisibility("DIN32676SERIES2STANDARD",False)
setVisibility("DIN32676SERIES2NONSTANDARD", False)
setVisibility("DIN32676SERIES3", False)
setVisibility("DIN11850", False)
Case "ISO 2037 SERIES 2"
setVisibility("ISO2037SERIES1", False)
setVisibility("ISO2037SERIES2", True)
setVisibility("ISO1127SERIES1", False)
setVisibility("DIN32676SERIES1",False)
setVisibility("DIN32676SERIES2STANDARD",False)
setVisibility("DIN32676SERIES2NONSTANDARD", False)
setVisibility("DIN32676SERIES3", False)
setVisibility("DIN11850", False)
Case "ISO 1127 SERIES 1"
setVisibility("ISO1127SERIES1", True)
setVisibility("ISO2037SERIES2", False)
setVisibility("ISO2037SERIES1", False)
setVisibility("DIN32676SERIES1",False)
setVisibility("DIN32676SERIES2STANDARD",False)
setVisibility("DIN32676SERIES2NONSTANDARD", False)
setVisibility("DIN32676SERIES3", False)
setVisibility("DIN11850", False)
End Select
End Sub
Public Sub setVisibility(bodyName As String, visible As Boolean)
Dim doc As PartDocument = ThisDoc.Document
Dim def As PartComponentDefinition = doc.ComponentDefinition
Dim bodies As IEnumerable(Of SurfaceBody) = def.SurfaceBodies.Cast(Of SurfaceBody)
Dim body As SurfaceBody = bodies.
Where(Function(b) b.Name.Equals(bodyName)).First()
body.Visible = visible
End Sub